As a longarm quilter, I won't use Mountain Mist batting - I have found them to be inconsistent in their quality with bare spots next to thick spots. It also tears very easily. Please read
http://www.imqa.org/media/uploads/20...Fall2011_1.pdf as polyester batting should not be used for bedding for people who cannot get away from it should it catch on fire - babies and the elderly. I think there is a reason quilt shops don't sell Mountain Mist. I know that 100% cotton, wool and the QD Dream Angel (
http://www.quiltersdreambatting.com/dream-angel.htm) are more expensive, but the cost of polyester batting melting on a baby would be horrific.